3M Transparent Weather Sealing Tape, 1.5" in x 30' ft, For Interior Windows and Doors, Moisture Resistant Tape, Helps Reduce Energy Loss, Seals Cracks, Made in the USA (2110NA)

For indoor use Measures 1.5 inches x 10 yards easily conforms to angles and curves Weather tape is flexible conforms to angles and curves Decreases heating costs Shrinks tight for wrinkle-free, clear-as-glass results Increases R-value by 90% over an average single pane window.